When people are really suffering, and we know they're suffering, that question can be a very difficult one. Inadvertently, I think without anyone meaning it, it communicates a lack of empathy.

Two things that I think matter are gratitude and joy.

We hold ourselves back in ways both big and small, by lacking self-confidence, by not raising our hands, and by pulling back when we should be leaning in.

Next time you're about to call your daughter bossy, take a deep breath and say, 'My daughter has executive leadership skills.'

But I really believe that when you give people authentic identity, which is what Facebook does, and you can be your real self and connect with real people online, things will change.

Women attribute their success to working hard, luck, and help from other people. Men will attribute that - whatever success they have, that same success - to their own core skills.

And what I saw happening is that women don't make one decision to leave the workforce. They makes lots of little decisions really far in advance that kind of inevitably lead them there.